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Finding the Fourth Proportional to 553,340.40, 830,010.60 and 385,378.80

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Solution

The fourth proportional to 553,340.40, 830,010.60 and 385,378.80 is: 578,068.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,340.40 : 830,010.60 = 385,378.80 : x
  2. Step 2: Convert to fraction form
    553,340.40/830,010.60 = 385,378.80/x
  3. Step 3: Cross multiply
    553,340.40x = 830,010.60 × 385,378.80
  4. Step 4: Simplify right side
    553,340.40x = 319,868,489,015.28
  5. Step 5: Solve for x
    x = 319,868,489,015.28/553,340.40
  6. Step 6: Final answer
    x = 578,068.20

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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.