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Finding the Fourth Proportional to 525,787.80, 788,681.70 and 315,317.40

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Solution

The fourth proportional to 525,787.80, 788,681.70 and 315,317.40 is: 472,976.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,787.80 : 788,681.70 = 315,317.40 : x
  2. Step 2: Convert to fraction form
    525,787.80/788,681.70 = 315,317.40/x
  3. Step 3: Cross multiply
    525,787.80x = 788,681.70 × 315,317.40
  4. Step 4: Simplify right side
    525,787.80x = 248,685,063,071.58
  5. Step 5: Solve for x
    x = 248,685,063,071.58/525,787.80
  6. Step 6: Final answer
    x = 472,976.10

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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.