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Finding the Fourth Proportional to 720,303.82, 994,018.95 and 398,011.10

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Solution

The fourth proportional to 720,303.82, 994,018.95 and 398,011.10 is: 549,255.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,303.82 : 994,018.95 = 398,011.10 : x
  2. Step 2: Convert to fraction form
    720,303.82/994,018.95 = 398,011.10/x
  3. Step 3: Cross multiply
    720,303.82x = 994,018.95 × 398,011.10
  4. Step 4: Simplify right side
    720,303.82x = 395,630,572,477.77
  5. Step 5: Solve for x
    x = 395,630,572,477.77/720,303.82
  6. Step 6: Final answer
    x = 549,255.13

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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.