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Finding the Fourth Proportional to 720,235.02, 993,897.63 and 397,938.18

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Solution

The fourth proportional to 720,235.02, 993,897.63 and 397,938.18 is: 549,139.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,235.02 : 993,897.63 = 397,938.18 : x
  2. Step 2: Convert to fraction form
    720,235.02/993,897.63 = 397,938.18/x
  3. Step 3: Cross multiply
    720,235.02x = 993,897.63 × 397,938.18
  4. Step 4: Simplify right side
    720,235.02x = 395,509,813,988.51
  5. Step 5: Solve for x
    x = 395,509,813,988.51/720,235.02
  6. Step 6: Final answer
    x = 549,139.94

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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.