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Finding the Fourth Proportional to 520,436.16, 717,981.93 and 348,409.53

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Solution

The fourth proportional to 520,436.16, 717,981.93 and 348,409.53 is: 480,657.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,436.16 : 717,981.93 = 348,409.53 : x
  2. Step 2: Convert to fraction form
    520,436.16/717,981.93 = 348,409.53/x
  3. Step 3: Cross multiply
    520,436.16x = 717,981.93 × 348,409.53
  4. Step 4: Simplify right side
    520,436.16x = 250,151,746,779.79
  5. Step 5: Solve for x
    x = 250,151,746,779.79/520,436.16
  6. Step 6: Final answer
    x = 480,657.89

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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.