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Finding the Fourth Proportional to 559,405.36, 771,999.24 and 317,681.20

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Solution

The fourth proportional to 559,405.36, 771,999.24 and 317,681.20 is: 438,411.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,405.36 : 771,999.24 = 317,681.20 : x
  2. Step 2: Convert to fraction form
    559,405.36/771,999.24 = 317,681.20/x
  3. Step 3: Cross multiply
    559,405.36x = 771,999.24 × 317,681.20
  4. Step 4: Simplify right side
    559,405.36x = 245,249,644,962.29
  5. Step 5: Solve for x
    x = 245,249,644,962.29/559,405.36
  6. Step 6: Final answer
    x = 438,411.32

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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.