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Finding the Fourth Proportional to 315,703.54, 435,774.71 and 251,290.93

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Solution

The fourth proportional to 315,703.54, 435,774.71 and 251,290.93 is: 346,864.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,703.54 : 435,774.71 = 251,290.93 : x
  2. Step 2: Convert to fraction form
    315,703.54/435,774.71 = 251,290.93/x
  3. Step 3: Cross multiply
    315,703.54x = 435,774.71 × 251,290.93
  4. Step 4: Simplify right side
    315,703.54x = 109,506,232,146.38
  5. Step 5: Solve for x
    x = 109,506,232,146.38/315,703.54
  6. Step 6: Final answer
    x = 346,864.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.