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Finding the Fourth Proportional to 553,391.70, 830,087.55 and 313,259.10

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Solution

The fourth proportional to 553,391.70, 830,087.55 and 313,259.10 is: 469,888.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,391.70 : 830,087.55 = 313,259.10 : x
  2. Step 2: Convert to fraction form
    553,391.70/830,087.55 = 313,259.10/x
  3. Step 3: Cross multiply
    553,391.70x = 830,087.55 × 313,259.10
  4. Step 4: Simplify right side
    553,391.70x = 260,032,478,834.21
  5. Step 5: Solve for x
    x = 260,032,478,834.21/553,391.70
  6. Step 6: Final answer
    x = 469,888.65

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.