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Finding the Fourth Proportional to 660,013.32, 988,345.35 and 553,116.18

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Solution

The fourth proportional to 660,013.32, 988,345.35 and 553,116.18 is: 828,270.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,013.32 : 988,345.35 = 553,116.18 : x
  2. Step 2: Convert to fraction form
    660,013.32/988,345.35 = 553,116.18/x
  3. Step 3: Cross multiply
    660,013.32x = 988,345.35 × 553,116.18
  4. Step 4: Simplify right side
    660,013.32x = 546,669,804,512.76
  5. Step 5: Solve for x
    x = 546,669,804,512.76/660,013.32
  6. Step 6: Final answer
    x = 828,270.87

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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.