Home / 645,459.54-890,721.51-358,973.47

Finding the Fourth Proportional to 645,459.54, 890,721.51 and 358,973.47

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Solution

The fourth proportional to 645,459.54, 890,721.51 and 358,973.47 is: 495,376.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,459.54 : 890,721.51 = 358,973.47 : x
  2. Step 2: Convert to fraction form
    645,459.54/890,721.51 = 358,973.47/x
  3. Step 3: Cross multiply
    645,459.54x = 890,721.51 × 358,973.47
  4. Step 4: Simplify right side
    645,459.54x = 319,745,393,034.82
  5. Step 5: Solve for x
    x = 319,745,393,034.82/645,459.54
  6. Step 6: Final answer
    x = 495,376.36

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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.