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Finding the Fourth Proportional to 999,970.32, 1,379,925 and 570,389.52

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Solution

The fourth proportional to 999,970.32, 1,379,925 and 570,389.52 is: 787,118.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,970.32 : 1,379,925 = 570,389.52 : x
  2. Step 2: Convert to fraction form
    999,970.32/1,379,925 = 570,389.52/x
  3. Step 3: Cross multiply
    999,970.32x = 1,379,925 × 570,389.52
  4. Step 4: Simplify right side
    999,970.32x = 787,094,758,386
  5. Step 5: Solve for x
    x = 787,094,758,386/999,970.32
  6. Step 6: Final answer
    x = 787,118.12

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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.